If you get fired from job, how long does it take you to forget?

whenever i got fired in past, i forgot it next minute and acted as if nothing happened and didn't waste one second feeling sorry or sad. However, I know people who go into severe depression, grief, and then require counseling. They just start falling apart and they feel as if they are loser and ashamed. Would you feel that way too if fired, or you wouldn't care like me?